PSIDs are Page-Scope IDs of your audience that Facebook creates to help a business to communicate with their audience on different channels.
You can export your Facebook PSIDs by following these steps
Step 1: On the Users section, click top checkbox to select all users
Step 2: Click on “Actions” button and select “Export PSIDs (Facebook Ads)” on the drop-down menu to download the data in an Excel format.
Step 3: You can get your audience details in .csv format for offline purpose.
